Under the background of population aging, this paper aims to explore the design theory and method of nursing bed suitable for the elderly, and therefore provide new research methods and design references for the design of nursing bed suitable for the elderly at home. INPD was combined with entropy weight method to guide the design research of home-friendly nursing bed for the elderly and design opportunities were found through SET analysis method. Concretely speaking, a questionnaire survey was conducted among nursing staff, the elderly and their family members in nursing homes to define the needs of the elderly for nursing beds. The entropy weight method was introduced into AHP to improve the quantitative research and calculate the weight value and prioritize the needs of target users. By drawing the design concept matrix, the design objectives were further deepened and screened, and the final design concept was obtained. The introduction of entropy weight method into AHP eliminates the influence of subjective evaluation, and the scientificity, effectiveness and rationality of the combination of INPD and entropy weight method are verified through practical design cases, which provide new research opportunities for the elderly care bed industry thus.